The Demon Queen's lover is her natural enemy

In a gripping tale, Kiara, once the fearsome Demon Queen, reigned over her realm. But her world was disrupted when an angel unexpectedly invaded. The angel, capable of stirring emotions in the previously emotionless Kiara, meted out a brutal demise. Consumed by a burning desire for vengeance, Kiara defied death itself, her spirit transcending time. As the demon realm crumbled, a legendary Crown granting unimaginable power fell through a universal portal. With it lost, every demon in existence embarked on a relentless search for the crown that could potentially restore their rule. Fast forward ten millennia, In a bustling human hospital, a girl with striking features lay declared dead. Yet, in a shocking turn of events, her eyes snapped open, and she declared, "Prepare for chaos! The Demon Queen returns. This time, the entire universe shall bear the brunt of my wrath!"